Alert archive / Illinois / Tornado Warnings in 1994

Tornado Warning 11, NWS St. Louis, MO

April 26, 1994Monroe County, Illinois

NWS St. Louis, MO issued this tornado warning at Apr 26, 1994, 9:27 PM CDT for Monroe County, Illinois. It was in force for 48 min.

The area

The counties it named.

The facts

Issued: Apr 26, 1994, 9:27 PM CDT (02:27 UTC)
Expired: Apr 26, 1994, 10:15 PM CDT
In force: 48 min
Issued by: NWS St. Louis, MO
Area: Whole counties

County Monroe County, IL

The nearest sounding before it

Paducah/Barkley, KY (KPAH), launched 00:00Z, 2.5 hours before the alert went out and 187 km from the middle of its area. This is the routine balloon launch nearest before it, the air the forecaster had in hand, not a measurement taken for the alert.

Skew-T log-p

Temperature in red, dew point in green, the mixed-layer parcel dashed.

Hodograph

The wind turning with height, colored by layer: ground to 1 km, 1 to 3 km, 3 to 6 km, 6 to 10 km.

Mixed-layer CAPE: 2999 J/kg
Mixed-layer CIN: -2 J/kg
Mixed-layer LCL: 1036 m above ground
0-6 km bulk shear: 36 kt
0-1 km storm-relative helicity: 128 m²/s²
0-3 km storm-relative helicity: 139 m²/s²
Significant tornado parameter: 1.8
Supercell composite: 10.5

Open this sounding in Storm Lab

The text

As transmitted, in the capitals the NWS used until 2016.

000 
TTAA00 KSTL 270228
TORSTL
ILC133-270315-
 
BULLETIN - EBS ACTIVATION REQUESTED
TORNADO WARNING
NATIONAL WEATHER SERVICE ST LOUIS MO
927 PM CDT TUE APR 26 1994
 
THE NATIONAL WEATHER SERVICE IN ST LOUIS HAS ISSUED A
TORNADO WARNING EFFECTIVE UNTIL 1015 PM CDT
FOR PEOPLE IN THE FOLLOWING LOCATION...
 
IN SOUTHWEST ILLINOIS
 
   ...MONROE COUNTY
 
AT 925 PM...NWS DOPPLER RADAR INDICATED A TORNADO JUST WEST OF WATERLOO
MOVING NORTHEAST AT 30 MPH.
 
IF YOU LIVE IN WATERLOO SEEK SHELTER NOW!
 
IF YOU ARE IN THE PATH OF A TORNADO...THE SAFEST PLACE IS A
BASEMENT.  GET UNDER A WORKBENCH OR PIECE OF STURDY FURNITURE.
IF NO BASEMENT IS AVAILABLE...SEEK SHELTER IN AN INTERIOR ROOM
SUCH AS A CLOSET ON THE LOWEST FLOOR.  USE BLANKETS...PILLOWS...
OR CUSHIONS TO COVER YOUR BODY.  AVOID WINDOWS.
 
FG

The office that day

Everything else NWS St. Louis, MO issued on the same UTC day.

Issued	Product	Office	Counties	Lasted
Apr 26, 8:07 PM CDT	Severe Thunderstorm Warning	LSX	Calhoun, Jersey	68 min
Apr 26, 8:55 PM CDT	Severe Thunderstorm Warning	LSX	Madison	65 min
Apr 26, 9:12 PM CDT	Tornado Warning	LSX	Macoupin, Montgomery	33 min
Apr 26, 9:43 PM CDT	Severe Thunderstorm Warning	LSX	Saint Clair	47 min
Apr 26, 9:54 PM CDT	Severe Thunderstorm Warning	LSX	Randolph	66 min
Apr 26, 10:14 PM CDT	Severe Thunderstorm Warning	LSX	Clinton, Washington	61 min
Apr 26, 10:30 PM CDT	Severe Thunderstorm Warning	LSX	Bond	45 min
Apr 26, 10:39 PM CDT	Severe Thunderstorm Warning	LSX	Fayette	51 min
Apr 26, 10:47 PM CDT	Severe Thunderstorm Warning	LSX	Jefferson, Marion	58 min
Apr 27, 12:33 AM CDT	Severe Thunderstorm Warning	LSX	Monroe, Saint Clair	42 min
Apr 27, 1:12 AM CDT	Severe Thunderstorm Warning	LSX	Clinton, Saint Clair	48 min
Apr 27, 2:40 AM CDT	Severe Thunderstorm Warning	LSX	Randolph	50 min
Apr 27, 3:02 AM CDT	Severe Thunderstorm Warning	LSX	Perry	43 min
Apr 27, 3:20 AM CDT	Tornado Warning	LSX	Perry	27 min
Apr 27, 6:58 PM CDT	Severe Thunderstorm Warning	LSX	Madison, Saint Clair	47 min

Nearby

Tornado Warnings in Illinois, 1994 Every tornado warning in 1994 Tornadoes in 1994

Sources

The product and its follow-ups from the Iowa Environmental Mesonet's archive of National Weather Service and Storm Prediction Center text; the sounding from the Mesonet's radiosonde archive.